Crash in Android

[cuttingedge03]

I am getting a lot of crashes on Android devices with NPE. Given below is the stack trace.

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.app.Activity.getPackageName()' on a null object reference
at com.vinzscam.reactnativefileviewer.RNFileViewerModule.open(RNFileViewerModule.java:55)
at java.lang.reflect.Method.invoke(Method.java)
at com.facebook.react.bridge.JavaMethodWrapper.invoke(JavaMethodWrapper.java:372)
at com.facebook.react.bridge.JavaModuleWrapper.invoke(JavaModuleWrapper.java:151)
at com.facebook.react.bridge.queue.NativeRunnable.run(NativeRunnable.java)
at android.os.Handler.handleCallback(Handler.java:815)
at android.os.Handler.dispatchMessage(Handler.java:104)
at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:27)
at android.os.Looper.loop(Looper.java:207)
at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:226)
at java.lang.Thread.run(Thread.java:818)

[claudiozam]

Hi @cuttingedge03 I have the same issue. Do you have news? Thanks

[cuttingedge03]

@claudiozam Nothing yet. Nobody from the dev team has responded yet on this issue.

[vinzscam]

Hi,
it looks the package hasn't been linked correctly. Which version of RN are you using it? How have you linked the package? Are you using autolinking for other native packages?

[cuttingedge03]

@vinzscam I am using RN 0.63.3. It was happening on 0.63.2 as well. Yes, I am using auto-linking. It works fine normally. This is the issue coming for few production users from Play Store.

[claudiozam]

@vinzscam I am using RN 0.61.5

[vinzscam]

it looks your issue might be related to the flow in your application. Are you invoking any other specific library before opening RN file viewer? Is it possible to have a snippet of your code?

[claudiozam]

  let fileRemoteURLString = 'https://.............';

  let actualDownloadFileFetchBlobGet = RNFetchBlob.config({
    path: RNFetchBlob.fs.dirs.DocumentDir + '/my-tmp/myfile.pdf'
  }).fetch('GET', fileRemoteURLString);

  actualDownloadFileFetchBlobGet.then(resp => {
      FileViewer.open(resp.path(), { showOpenWithDialog: false, showAppsSuggestions: true })
      .then(() => {
        // success
      })
      .catch(errorFileViewer => {
        // log error
      });

  }).catch(errorRespFetchBlob => {
     // log error
  });

[cpecorari]

Hi, had a similar issue for a few weeks, finally found that another library intercepted a signal and made the app crash.
See there : react-native-image-picker/react-native-image-picker#1398
Solved by upgrading react-native-image-picker in my case, so check your other libraries.

[christophemenager]

@cuttingedge03 I have the similar issue in production

com.vinzscam.reactnativefileviewer.RNFileViewerModule.open
RNFileViewerModule.java, line 55
java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String android.app.Activity.getPackageName()' on a null object reference

Stack trace

com.vinzscam.reactnativefileviewer.RNFileViewerModule.open RNFileViewerModule.java:55
java.lang.reflect.Method.invoke Method.java
com.facebook.react.bridge.JavaMethodWrapper.invoke JavaMethodWrapper.java:372
com.facebook.react.bridge.JavaModuleWrapper.invoke JavaModuleWrapper.java:151
com.facebook.react.bridge.queue.NativeRunnable.run NativeRunnable.java
android.os.Handler.handleCallback Handler.java:938
android.os.Handler.dispatchMessage Handler.java:99
com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage MessageQueueThreadHandler.java:27
android.os.Looper.loop Looper.java:246
com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run MessageQueueThreadImpl.java:226
java.lang.Thread.run Thread.java:923

[vinzscam]

Fixed by #124